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Scientists think they've figured out why green tea helps you lose weight

Green tea is one of those things that’s really healthy for you, but its health benefits have been greatly exaggerated; one of the things which has been consistently reported about green tea is that it helps you lose weight, but scientists didn’t know how (or if) this happens. Now, a team from Poland believe they’ve […]

Simple device shows where your patient's veins are

No one likes to take a shot, and if there’s one thing we hate more than taking a shot is having to take more shots because someone missed your vein. But as any doctor will tell you, finding a vein is sometimes difficult – here’s where VeinViewer enters the stage. Designed by Memphis-based company Christie Medical Holdings, […]

How long does food stay fresh? Learn what expiration dates really mean

Experts did the math and they estimate that $165 billion worth of perfectly edible food gets tossed each year, due to it passing it's expiration date. But most of these dates are largely made up.

Why you're freezing in the office: AC thermostat is optimized for a 154 pounds, 40-year-old man

Women often complain the AC is turned way too high at work. Many are forced by necessity to come to work on a hot summer day with a spare sweater or a freaking Snuggie, while men coworkers seem to be all fine, comfortable wearing only shorts and a T-shirt. Clearly, some people feel colder or hotter than others when exposed to the same temperature. However, I think nowadays it's no secret that most women get terribly uncomfortable in the conditions set by most thermostats at work. Now, a new study suggests that the way climate control in office buildings has been designed in the past couple of decades is discriminatory and doesn't reflect reality. That's because although in most workplaces today you'll find men and women in equal proportion, the AC is geared to provide the optimal comfort conditions for a 154 pounds, 40 year-old man. This profile may have been representative 50 years ago, but today it's outdated. It's time to align thermostats with today's needs.

Semen regulates female's gene expression and behavior (curbs depression, for instance)

There's more to seminal fluid, which makes up to 70% of semen's composition, than procreation. Scientists are only recently beginning to understand how the seminal fluid is interacting with the female brain and body, and findings so far may be surprising for some. For instance, in animals - including humans - semen affects the female reproductive tract, to maximize the changes of conception. But it doesn't stop here. The influence of semen on females might go even beyond this. In experiments on fruit flies, scientists found the females had altered gene expression post semen exposure, while males produce more seminal proteins when there are more rivals. Suddenly, semen just got a heck of a lot more complicated.

Australian scientists reportedly found a cure for hangover

CSIRO, Australia's peak science body has reportedly discovered one of the more sought after cures in human history: the cure for a hangover. The secret? A simple fruit, the pear.

The age of the centenarians: elderly population over 100 years to increase ten fold by 2035

If you were born in 1900, you could call yourself lucky if you'd seen a day past your 50th birthday. The XXth century, however, marked an amazing leap in longevity thanks to the advent of vaccines, increased public health awareness and medical discoveries. In time, the leading causes of death and illness have shifted from infectious and parasitic diseases to noncommunicable diseases and chronic conditions. Sure, more people die today of cancer and heart disease than ever before, but it sure beats dying of typhoid. The extra decades in lifespan sure don't sound bad, either. Life expectancy at birth now exceeds 83 years in Japan—the current leader—and is at least 81 years in several other countries. The trend seems to be accelerating, especially for those at the extreme lifespan end. The population of adults 85 and older is projected to increase 351 percent by 2050, while those older than 100 will increase 10-fold between 2010 and 2050.

New vaccine against Ebola is 100% effective in Guinea trial

“Having seen the devastating effects of Ebola on communities and even whole countries with my own eyes, I am very encouraged by today’s news,” said Børge Brende, the foreign minister of Norway, which helped fund the trial.

Sugar with that? Sweetening coffee or tea really changes your drink

Coffee and tea taste bitter to most people because of the caffeine. Of course, some like their coffee dark, but most people, including yours truly, can't have a sip without at least a lump of sugar inside. Apparently, we're on to something. Adding sugar to coffee or tea not only cuts the bitterness, but changes the chemistry of the drink at a fundamental level, according to Dr. Seishi Shimizu at University of York.

This GMO rice tackles global warming by emitting 100 times less methane

Following a three-year-long trial in the rice of fields of China, scientists report a new genetically modified strain that promises to dramatically reduce the otherwise huge carbon footprint of rice farming. The new GMO crop emits only 1% of the methane - a highly potent greenhouse gas - that an unaltered rice paddies leaches out into the atmosphere. So far, the crop looks extremely advantageous but the unfavorable social climate against GMOs doesn't help at all, particularly in China where the public is very sensitive and no genetically modified rice variety has been allowed on its fields apart from this trial. China is the second largest producer of rice in the world.

Scientists find a way to transform cells into tiny lasers

Scientists have created a mixture of oil and fluorescent dyes that can be safely added to human cells – the dye then gets activated by short pulses of light and starts behaving like a laser, communicating the tissue’s position to doctors. The technology could add new ways for light to be used in diagnosis and treatment […]

Fat is recognized as the sixth basic taste, but it's awful on its own

Distilling tastes and flavors to their most basic constituents is essential to making food the tastiest it can be. We currently know of five basic tastes: sweet, sour, salty, bitter and the somewhat hard to pin down umami (think savory or anchovies, tomato juice, the likes). Now, a group claims it has pinned down the sixth: fat. Bacon lovers throughout the world might rejoice at the news. However, if you like bacon you should feel grateful you didn't take part in this study because isolated fat molecules are reportedly awful tasting. Distinct yes, but quite awful. In fact, to distinguish from what people generally refer to as "fat", the researchers at Purdue University propose a new term to describe the sixth basic taste: oleogustus.

The first Americans came from Russia's frozen expanse, Siberia, some 23,000 years ago

The first humans to reach the Americas came from Siberia in a single group some 23,000 years ago, at the height of the last Ice Age, says the new study. On their way to Alaska, they hanged around in the northern regions for a few thousands of years before moving deeper into North and South America.

Tell me what music you like and I'll tell you how you think - Music preference connected to cognitive style

Do you enjoy the quiet, elaborate jazz rhythms, or are you more a metal fan? Is classical music your thing, or are you more into hip hop? That may say more about your personality than you think, according to a new research.

Foods and drinks might be labeled for added sugar intake, FDA proposes

Companies in the US might be mandated by the FDA to list the amount of added sugar in their products as a percent of the recommended daily calorie intake. Last year, the FDA proposed to include the amount of added sugars in grams on the Nutrition Facts label. Now, the same agency thinks it would be more informative to consumers if the label is displayed as a percentage to fit a context.

Blind pensioner can see again following bionic eye implant

An 80-year-old man suffering from age-related macular degeneration (AMD) - the most common cause of sight loss in the world - can now see again after being fitted with a bionic eye. The technology was developed at the Manchester Royal Eye Hospital, and the implant marks the first trial for the Argus II system for AMD.

14,000-year-old molar gives us oldest proof of dentistry, and will make you love your dentist's drill

Just as today -or a little less often, as we tend to abuse our teeth quite a bit nowadyas – early humans had to deal with cavities. An infected 14,000 year old molar may give us a glimpse into how they treated such afflictions, and is the oldest known evidence of dentistry.

About the 28th element essential to sustaining life, discovered by scientists

The scientific world has commonly agreed upon 27 elements that are literally essential for human life. However, a study proved the existence of a 28th element, bromine, which is among the 92 naturally-occurring chemical elements in the entire universe, as vital for tissue development in all animals, from the primitive sea creatures to humans included. The […]

Scientists identify 4 types of drunks - which one are you?

Are you a Hemingway, a Nutty Professor, or a Poppins?? No, that’s not the latest Facebook game (although it’d be really fun to see one implemented), but it’s a classification introduced by researchers at the University of Missouri. Basically, depending on how your personality changes when you start drinking, they’ve defined 4 types: the Hemingways, […]

Gene therapy restores hearing in deaf mice, paving the way for human treatment

Mice with genetic hearing loss could sense and respond to noises after receiving working copies of their faulty genes, researchers report. Because the mice’s mutated genes closely correspond to those responsible for some hereditary human deafness, the scientists hope the results will inform future human therapies.

These images show how different and unique tears really are

In our day to day lives, we don’t give much thought to tears – we usually focus more on the emotions that cause them than the salty droplets themselves. Well, tears are much more complex than we give them credit for, as Dutch artist Maurice Mikkers showed. Tears Caused By Emotional Response: There are actually three […]

No laughing matter: scientists study the effects of laughing gas

Nitrous oxide, commonly known as laughing gas, is a simple chemical composed of two nitrogen atoms and one oxygen atom (N2O). Despite being used as an anesthetic since the 1800s, the effects it has on the brain are not well understood. In a new study published in this week in Clinical Neurophysiology, MIT researchers reveal some key brainwave changes caused by the gas.

A simple sniff test might diagnose autism in toddlers

Children with autism spectrum disorder do not react as well to pleasant or foul smells compared to non-ASD children. Previously, autistic toddlers were found to have a dampened response to sight, sound and touch. For their study, the researchers at the Weizmann Institute of Science in Israel used a novel technique to gauge the smell response in both ASD and control groups, with 81% accuracy. The test is unobtrusive and doesn't require a personal account from behalf of the children - something that can be difficult to do with autistic children, who more often than not are highly uncommunicative. If the test can survive the test of time and other trials, it could very well be used to diagnose autism.

Eating green leafy vegetables keeps your brain strong

Something as simple as eating more leafy veggies could significantly slow down cognitive decline and keep your brain healthier for a longer period of time. A new study found that nutrients and vitamins found in plants such as spinach, kale, collards and mustard greens help keep your mental abilities sharp.

Blue eyes linked to higher levels of alcohol dependence

According to an unusual study conducted by University of Vermont researchers, people with blue eyes may be more likely to become alcoholics – and researchers are trying to figure out why. Human eye color is a pretty strange thing – it’s an inherited trait influenced by more than one gene. These genes cause small changes […]

So, you think you can crack actual medical mysteries? Here's where you can try it

A startup will allow voluntary internet detectives to study unusual medical cases and attempt to solve them. Millions of people suffer from rare or complex medical conditions for which they have received no diagnosis, but where a handful of doctors have failed, the collective force of the internet can do it – we can do it. […]

Everyone might one day wear this electronic temporary tattoo that monitors your vital signs

For the past couple of years, John Rogers, a materials science professor at the University of Illinois, has been working on his pet-project: the Biostamp. True to its name, the device is basically a tiny electronic stamp, no larger than a quarter, that sticks to the skin and can be worn seamlessly. The whole time, the Biostamp collects on a variety of vital signs, depending on the embedded sensor, and is powered wirelessly via your mobile phone. It can analyze chemicals in your sweat; blood pressure; UV radiation and much more. Basically, it's transforming the way patients are monitored. In fact, it's changing the way people, sick or not, monitor their health. Imagine wearing a Biostamp all the time and receiving a notification on your mobile phone to visit your doctor ASAP because your blood pressure has been too high in the last couple of days.

First person to die of the measles in a dozens years - why did it happen?

In 2000, the CDC declared measles as eradicated in the US, meaning there was no more endemic transmission. That doesn't mean though, that it can't creep out from time to time, especially in communities where heard immunity is poor because of low rates of vaccination. This is attested by a woman who unfortunately died of the virus, making it a first in twelve years. The woman was taking medications that suppressed her immune system due to other conditions, and this made it very difficult for her body to fight another infection.

Woolly Mammoth genome sequencing makes cloning a lot more doable

A team at University of Chicago made the most comprehensive woolly mammoth genome sequencing ever. By comparing its genome with that of its distant cousins, the Asian and African elephants, the researchers were able to determine which are the mammoth's specific genes. These were ran with libraries and repositories to identify what these do. We now know which of mammoth's gene shaped its uncanny skull and small ears, how it got hair to cover all its body or how the mammoth adapted a special fat metabolism and cold coping mechanism. To test their findings, the researchers transplanted a mammoth gene into a human cell. The kidney cell produced new proteins which were tolerant to heat or cold, as suspected showing their other genetic determinations are also likely correct.

A (Lucky) Iron Fish is helping Halve Anemia in Cambodia

This little iron fish may look like a two bit souvenir, but what it can do is far more spectacular, not to mention useful. When added in boiling water, the fish-shaped object leaches just enough iron to offer up to 75 percent of daily iron needs of a person. Tests so far have proven that this simple, yet innovative the solution helped halve the cases of iron-deficiency anemia in Cambodian communities.

Men and women feel pain differently, on a biological level

A breakthrough research found that male and female mice use different cells to signal pain. This could explain why both more women suffer from chronic pain than men, and pain relief medication seems to respond differently in women.

Flushing toilets: a luxury for billions around the world

A report issued by the World Health Organization and UNICEF states 2.4 billion people lack access to proper toilets. Defecating outdoors bears a significant risk to the fresh water supply and is associated with the death of 700,000 children each year which contact diseases like diarrhoeal.

Sugary drinks kill 180,000 adults worldwide

Low and middle-income countries bear the most deaths associated with sugary drink consumption. About 3 out of 4 deaths related to drinking sugary drinks happen in developing countries. These drinks greatly contribute to obesity, which in turn is associated with Type 2 diabetes, cardiovascular disease and cancers of the breast, colon, esophagus, gall bladder, kidney, pancreas and ovaries.

On Genetic Manipulation and the Government’s Role in Science

In an announcement that’s been a long time coming for science fiction fans, the White House has, for the first time, come out in support of a global moratorium on altering the human germline. It’s a decision that has implications not just for this particular type of scientific inquiry, but also for the future of […]

Radiologists miss out on 7% of cancers - this computer algorithm doesn't

Among the many tools it has in its arsenal, cancer is also very good at hiding - so good that according to a study, we miss 7% of cancers even when we have an X-Ray. But a company is looking to change all that an employ the help of accurate computer algorithms.

Liberia in quarantine after new Ebola case kills a boy

Just as it seemed Ebola was gone for now, the disease starts to rear its ugly head again; a 17-year old was killed a month after Liberia was declared free of Ebola. Liberian authorities on Tuesday quarantined the Nedowein close to the capital of Monrovia, where the boy lived. The official announcement came quickly after. “Liberia […]

Drinking too much water can be fatal: just do it when you're thirsty

Just before sport camps and marathon training begins in the US, doctors report a new set of guidelines that should be reviewed to ensure athletes don't consume more water than they should. Drinking excessive amounts of water can result in potentially serious reductions in blood sodium a condition called hyponatremia. Last year, two high school football players died of exercise-associated hyponatremia (EAH). So, what do you need to do to be on the safe side? Just drink water when you're thirsty. If you have to drink in advance for various reasons - say, if you're a marathon runner - keep the excess water at sensible levels.

Tracing Ivory DNA helps curb massive poaching that's killing 1 in 10 elephants each year

We seem to be losing the war on elephant poachers, but a new toolset that involves tracing slaughter hotspots in Africa based on DNA taken from ivory might be exactly what law enforcement needed all these years. This way, researchers at University of Washington, in collaboration with INTERPOL, found that most of the ivory seized since 2006 originates in just two areas.

Finger-prick test can diagnose Ebola as easily as a pregnancy test

A new mobile Ebola test can detect the virus using a single drop of blood and reports a positive or negative result in under 15 minutes. When the ReEBOV test was applied in the field, it identified 100 percent of all infected patients who also got positive results with the lab test. Coupled with other recent advances in the fight against Ebola, like antiviral vaccines, the new test will help prevent another outbreak and hopefully contain the virus for good.

Your memories last as long the neural connections: a long-standing theory now confirmed

Neuroscientists have long posited that memories last as long as the connections in the brain, but putting this theory to test has always proved challenging. Using the latest imaging techniques and sheer innovation, a group at Stanford confirmed this as being true after the researchers literally peered into the brains of mice and studied brain connections as they formed or were replaced. Once the connection was lost, so was the memory.

One in Eight HIV-positive Americans are not aware they're carrying the virus

A new extensive report carried out by the Centers for Disease Control and Prevention (CDC) found approximately 1 in 8 Americans with human immunodeficiency disease (HIV) are unaware of their condition. Overall, that means 14 percent of undiagnosed cases among 1.2 million patients with HIV in the US. An undiagnosed population is the prime contributor to the spread of the disease. Clearly, there's much room for improvement.

New dietary guidelines will bring fats back

"Fat is bad" seems to be a general rule when concocting dietary guidelines, but fatty foods may be making a comeback for all the right reasons. The latest version of the Dietary Guidelines for Americans, which is due out later this year will eliminate the upper limit for total dietary fat intake.

This baby was born with a rare condition that deformed his skull

Meet Matthew, a bright eyes, chubby cheeked baby. On the outside he looks and behaves like any regular baby his age, with one exception: an usually oblong-shaped head. At first, his parents dismissed it as a family feature, but when Matthew turned two months and visited the pediatrician for his regular check-up the doctor immediately […]

When supercomputers start to cook: meet Chef Watson

There are probably a million cooking apps out there, but none of them are backed by a supercomputer. Meet Chef Watson: a “cognitive computing app” that promises to revolutionize the way you cook and expand your gastronomic comfort zone.

Tricking your body to think it's fasting might help you live longer and healthier

Fasting has been practiced since ancient times as a cleansing process, often accompanied by prayer and periods of seclusion. Famous enlightened historical figures like Jesus or Buddha are prime examples of such ascetic practice. The latter raised fasting to an artform. But fasting needs not be merely associated with spiritualism or religion - it could very well be a great tool to improve your health. Several studies have documented the benefits of fasting, but on the other hand how many of us could go through such excruciating torments, living on water alone for days at a time (some Buddhist monks do it for weeks). After all, low calorie diets are hard enough, let alone not eating altogether. A new study, however, suggests that there might be a way to trick your body it's in fasting mode, and thus reap the benefits, without actually going overboard.

Medical Marijuana benefits are largely unproven and poorly documented, study finds

An extensive meta-analysis of 79 trials which studied the medical benefits of marijuana found that the various cannabinoid compounds did not improve nausea, vomiting, or appetite, but slightly improved chronic pain and plasticity. Moreover, most of the studies were poorly made, lacking control or placebo groups and also showing increased risk of bias. In short, this rigorous analysis found no conclusive evidence that supports the much heralded added benefits of medical marijuana. Side effects were common and included dizziness, dry mouth and sleepiness. The authors note that this doesn't mean that marijuana compounds aren't working as advertised, it's just that the science so far is inconclusive - mainly because of bad reporting and investigative techniques. They suggest more research is necessary, along with more support from the authorities and other able bodies given that we're talking about an extremely widespread drug ingested by millions of Americans each day, legally or not.

Viagra has its nasty side effects, but skin cancer isn't one of them

Viagra does things to you... but not skin cancer.

New "organ on a chip" design could eliminate the need for animal testing

A clear, apparently simple plastic chip could eliminate the need for animal testing. The design, which basically mimics the functions of human organs, won the Design of the Year award from the Design Museum in London.

An ancient human who lived in Romania had almost 9% Neanderthal DNA

DNA analysis of the jawbone of a human who lived in modern day Romania some 40,000 years ago has the most Neanderthal ancestry ever seen. Up to 9% of the ancient man's DNA was Neanderthal, suggesting interbreeding occurred much earlier than previously thought. In fact, this European human had a Neanderthal ancestor four to six generations back in his family tree. How would it be to have a Neanderthal for a great-great-great-grandfather?

Rising oceans and sinking bread: how climate change might ruin loaves

A research group working at the Australian Grains Free Air CO₂ Enrichment facility (AgFace) in Victoria is studying the effect elevated carbon dioxide will have on crops such as wheat, lentils, canola and field pea. They grow experimental crops in the open, surrounded by thin tubes that eject carbon dioxide into the air around the plants. Findings show that crops have higher yield (up to 25% more), but less proteins. Elevated CO2 also seems to ruin bread made from the grown wheat.

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